linux.git/arch/mips, branch v6.1.154

mips: lantiq: xway: sysctrl: rename the etop node

2025-09-04T13:26:24+00:00

[ Upstream commit 8c431ea8f3f795c4b9cfa57a85bc4166b9cce0ac ]

Bindig requires a node name matching ‘^ethernet@[0-9a-f]+$’. This patch
changes the clock name from “etop” to “ethernet”.

This fixes the following warning:
arch/mips/boot/dts/lantiq/danube_easy50712.dtb: etop@e180000 (lantiq,etop-xway): $nodename:0: 'etop@e180000' does not match '^ethernet@[0-9a-f]+$'
	from schema $id: http://devicetree.org/schemas/net/lantiq,etop-xway.yaml#

Fixes: dac0bad93741 ("dt-bindings: net: lantiq,etop-xway: Document Lantiq Xway ETOP bindings")
Signed-off-by: Aleksander Jan Bajkowski 
Acked-by: Jakub Kicinski 
Signed-off-by: Sasha Levin

mips: dts: lantiq: danube: add missing burst length property

2025-09-04T13:26:24+00:00

[ Upstream commit 7b28232921782aa38048249132899c337405eaa8 ]

The upstream dts lacks the lantiq,{rx/tx}-burst-length property. Other
issues were also fixed:
arch/mips/boot/dts/lantiq/danube_easy50712.dtb: etop@e180000 (lantiq,etop-xway): 'interrupt-names' is a required property
	from schema $id: http://devicetree.org/schemas/net/lantiq,etop-xway.yaml#
arch/mips/boot/dts/lantiq/danube_easy50712.dtb: etop@e180000 (lantiq,etop-xway): 'lantiq,tx-burst-length' is a required property
	from schema $id: http://devicetree.org/schemas/net/lantiq,etop-xway.yaml#
arch/mips/boot/dts/lantiq/danube_easy50712.dtb: etop@e180000 (lantiq,etop-xway): 'lantiq,rx-burst-length' is a required property
	from schema $id: http://devicetree.org/schemas/net/lantiq,etop-xway.yaml#

Fixes: 14d4e308e0aa ("net: lantiq: configure the burst length in ethernet drivers")
Signed-off-by: Aleksander Jan Bajkowski 
Acked-by: Jakub Kicinski 
Signed-off-by: Sasha Levin

lib/crypto: mips/chacha: Fix clang build and remove unneeded byteswap

2025-08-28T14:26:05+00:00

commit 22375adaa0d9fbba9646c8e2b099c6e87c97bfae upstream.

The MIPS32r2 ChaCha code has never been buildable with the clang
assembler.  First, clang doesn't support the 'rotl' pseudo-instruction:

    error: unknown instruction, did you mean: rol, rotr?

Second, clang requires that both operands of the 'wsbh' instruction be
explicitly given:

    error: too few operands for instruction

To fix this, align the code with the real instruction set by (1) using
the real instruction 'rotr' instead of the nonstandard pseudo-
instruction 'rotl', and (2) explicitly giving both operands to 'wsbh'.

To make removing the use of 'rotl' a bit easier, also remove the
unnecessary special-casing for big endian CPUs at
.Lchacha_mips_xor_bytes.  The tail handling is actually
endian-independent since it processes one byte at a time.  On big endian
CPUs the old code byte-swapped SAVED_X, then iterated through it in
reverse order.  But the byteswap and reverse iteration canceled out.

Tested with chacha20poly1305-selftest in QEMU using "-M malta" with both
little endian and big endian mips32r2 kernels.

Fixes: 49aa7c00eddf ("crypto: mips/chacha - import 32r2 ChaCha code from Zinc")
Cc: stable@vger.kernel.org
Reported-by: kernel test robot 
Closes: https://lore.kernel.org/oe-kbuild-all/202505080409.EujEBwA0-lkp@intel.com/
Link: https://lore.kernel.org/r/20250619225535.679301-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers 
Signed-off-by: Greg Kroah-Hartman

MIPS: lantiq: falcon: sysctrl: fix request memory check logic

2025-08-28T14:26:00+00:00

[ Upstream commit 9c9a7ff9882fc6ba7d2f4050697e8bb80383e8dc ]

request_mem_region() will return NULL instead of error code
when the memory request fails. Therefore, we should check if
the return value is non-zero instead of less than zero. In
this way, this patch also fixes the build warnings:

arch/mips/lantiq/falcon/sysctrl.c:214:50: error: ordered comparison of pointer with integer zero [-Werror=extra]
  214 |                                 res_status.name) < 0) ||
      |                                                  ^
arch/mips/lantiq/falcon/sysctrl.c:216:47: error: ordered comparison of pointer with integer zero [-Werror=extra]
  216 |                                 res_ebu.name) < 0) ||
      |                                               ^
arch/mips/lantiq/falcon/sysctrl.c:219:50: error: ordered comparison of pointer with integer zero [-Werror=extra]
  219 |                                 res_sys[0].name) < 0) ||
      |                                                  ^
arch/mips/lantiq/falcon/sysctrl.c:222:50: error: ordered comparison of pointer with integer zero [-Werror=extra]
  222 |                                 res_sys[1].name) < 0) ||
      |                                                  ^
arch/mips/lantiq/falcon/sysctrl.c:225:50: error: ordered comparison of pointer with integer zero [-Werror=extra]
  225 |                                 res_sys[2].name) < 0))
      |

Signed-off-by: Shiji Yang 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: Don't crash in stack_top() for tasks without ABI or vDSO

2025-08-28T14:26:00+00:00

[ Upstream commit e9f4a6b3421e936c3ee9d74710243897d74dbaa2 ]

Not all tasks have an ABI associated or vDSO mapped,
for example kthreads never do.
If such a task ever ends up calling stack_top(), it will derefence the
NULL ABI pointer and crash.

This can for example happen when using kunit:

    mips_stack_top+0x28/0xc0
    arch_pick_mmap_layout+0x190/0x220
    kunit_vm_mmap_init+0xf8/0x138
    __kunit_add_resource+0x40/0xa8
    kunit_vm_mmap+0x88/0xd8
    usercopy_test_init+0xb8/0x240
    kunit_try_run_case+0x5c/0x1a8
    kunit_generic_run_threadfn_adapter+0x28/0x50
    kthread+0x118/0x240
    ret_from_kernel_thread+0x14/0x1c

Only dereference the ABI point if it is set.

The GIC page is also included as it is specific to the vDSO.
Also move the randomization adjustment into the same conditional.

Signed-off-by: Thomas Weißschuh 
Reviewed-by: David Gow 
Reviewed-by: Huacai Chen 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: vpe-mt: add missing prototypes for vpe_{alloc,start,stop,free}

2025-08-28T14:25:59+00:00

[ Upstream commit 844615dd0f2d95c018ec66b943e08af22b62aff3 ]

These functions are exported but their prototypes are not defined.
This patch adds the missing function prototypes to fix the following
compilation warnings:

arch/mips/kernel/vpe-mt.c:180:7: error: no previous prototype for 'vpe_alloc' [-Werror=missing-prototypes]
  180 | void *vpe_alloc(void)
      |       ^~~~~~~~~
arch/mips/kernel/vpe-mt.c:198:5: error: no previous prototype for 'vpe_start' [-Werror=missing-prototypes]
  198 | int vpe_start(void *vpe, unsigned long start)
      |     ^~~~~~~~~
arch/mips/kernel/vpe-mt.c:208:5: error: no previous prototype for 'vpe_stop' [-Werror=missing-prototypes]
  208 | int vpe_stop(void *vpe)
      |     ^~~~~~~~
arch/mips/kernel/vpe-mt.c:229:5: error: no previous prototype for 'vpe_free' [-Werror=missing-prototypes]
  229 | int vpe_free(void *vpe)
      |     ^~~~~~~~

Signed-off-by: Shiji Yang 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: mm: tlb-r4k: Uniquify TLB entries on init

2025-08-15T10:05:13+00:00

commit 35ad7e181541aa5757f9f316768d3e64403ec843 upstream.

Hardware or bootloader will initialize TLB entries to any value, which
may collide with kernel's UNIQUE_ENTRYHI value. On MIPS microAptiv/M5150
family of cores this will trigger machine check exception and cause boot
failure. On M5150 simulation this could happen 7 times out of 1000 boots.

Replace local_flush_tlb_all() with r4k_tlb_uniquify() which probes each
TLB ENTRIHI unique value for collisions before it's written, and in case
of collision try a different ASID.

Cc: stable@kernel.org
Signed-off-by: Jiaxun Yang 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

mips: Add -std= flag specified in KBUILD_CFLAGS to vdso CFLAGS

2025-06-27T10:07:30+00:00

commit 0f4ae7c6ecb89bfda026d210dcf8216fb67d2333 upstream.

GCC 15 changed the default C standard dialect from gnu17 to gnu23,
which should not have impacted the kernel because it explicitly requests
the gnu11 standard in the main Makefile. However, mips/vdso code uses
its own CFLAGS without a '-std=' value, which break with this dialect
change because of the kernel's own definitions of bool, false, and true
conflicting with the C23 reserved keywords.

  include/linux/stddef.h:11:9: error: cannot use keyword 'false' as enumeration constant
     11 |         false   = 0,
        |         ^~~~~
  include/linux/stddef.h:11:9: note: 'false' is a keyword with '-std=c23' onwards
  include/linux/types.h:35:33: error: 'bool' cannot be defined via 'typedef'
     35 | typedef _Bool                   bool;
        |                                 ^~~~
  include/linux/types.h:35:33: note: 'bool' is a keyword with '-std=c23' onwards

Add -std as specified in KBUILD_CFLAGS to the decompressor and purgatory
CFLAGS to eliminate these errors and make the C standard version of these
areas match the rest of the kernel.

Signed-off-by: Khem Raj 
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

mips: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation

2025-06-27T10:07:24+00:00

commit 08f6554ff90ef189e6b8f0303e57005bddfdd6a7 upstream.

A future change will move CLANG_FLAGS from KBUILD_{A,C}FLAGS to
KBUILD_CPPFLAGS so that '--target' is available while preprocessing.
When that occurs, the following error appears when building ARCH=mips
with clang (tip of tree error shown):

  clang: error: unsupported option '-mabi=' for target 'x86_64-pc-linux-gnu'

Add KBUILD_CPPFLAGS in the CHECKFLAGS invocation to keep everything
working after the move.

Signed-off-by: Nathan Chancellor 
Signed-off-by: Masahiro Yamada 
Signed-off-by: Nathan Chancellor 
Signed-off-by: Greg Kroah-Hartman

MIPS: Loongson64: Add missing '#interrupt-cells' for loongson64c_ls7a

2025-06-27T10:07:16+00:00

[ Upstream commit 6d223b8ffcd1593d032b71875def2daa71c53111 ]

Similar to commit 98a9e2ac3755 ("MIPS: Loongson64: DTS: Fix msi node for ls7a").

Fix follow warnings:
  arch/mips/boot/dts/loongson/loongson64c_4core_ls7a.dts:28.31-36.4: Warning (interrupt_provider): /bus@10000000/msi-controller@2ff00000: Missing '#interrupt-cells' in interrupt provider
  arch/mips/boot/dts/loongson/loongson64c_4core_ls7a.dtb: Warning (interrupt_map): Failed prerequisite 'interrupt_provider'

Fixes: 24af105962c8 ("MIPS: Loongson64: DeviceTree for LS7A PCH")
Tested-by: WangYuli 
Signed-off-by: WangYuli 
Reviewed-by: Philippe Mathieu-Daudé 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin